package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 获取营业额统计数据
     * @param begin
     * @param end
     * @return TurnoverReportVO
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //获取日期
        List<LocalDate> dates = new ArrayList<>();
        dates.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dates.add(begin);//获取订单数据
        }

        //查询对应日期的营业额数据
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dates){
            //设置开始时间和结束时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            HashMap params = new HashMap();
            params.put("begin", beginTime);
            params.put("end", endTime);
            params.put("status", Orders.COMPLETED);
            //获取营业额
            Double turnover = orderMapper.getTurnoverByDate(params);
            turnover = turnover == null? 0.0 : turnover;
            turnoverList.add(turnover);
        }

        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 获取用户统计数据
     * @param begin
     * @param end
     * @return UserReportVO
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //获取日期
        List<LocalDate> dates = new ArrayList<>();
        dates.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dates.add(begin);//获取订单数据
        }

        //获取总用户
        List<Integer> totalUserList = new ArrayList<>();

        //获取每日新增用户
        List<Integer> newUserList = new ArrayList<>();

        dates.forEach(date -> {
            //设置开始时间和结束时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            HashMap time = new HashMap();
            time.put("end", endTime);
            Integer totalUser = userMapper.countByMap(time);
            totalUserList.add(totalUser);

            time.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(time);
            newUserList.add(newUser);
        });

        return UserReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    /**
     * 获取订单统计数据
     * @param begin
     * @param end
     * @return OrderReportVO
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //获取日期
        List<LocalDate> dates = new ArrayList<>();
        dates.add(begin);
        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dates.add(begin);
        }

        //获取每日订单数量
        List<Integer> totalOrderList = new ArrayList<>();

        //获取每日有效订单数量
        List<Integer> validOrderList = new ArrayList<>();

        dates.forEach(date -> {
            //设置开始时间和结束时间
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            HashMap time = new HashMap();
            time.put("begin", beginTime);
            time.put("end", endTime);

            Integer totalOrder = orderMapper.countByDate(time);
            totalOrderList.add(totalOrder);

            time.put("status", Orders.COMPLETED);
            Integer validOrder = orderMapper.countByDate(time);
            validOrderList.add(validOrder);
        });

        Integer totalOrderCount = totalOrderList.stream().reduce(Integer::sum).get();

        Integer validOrderCount = validOrderList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0){
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount.doubleValue();
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dates, ","))
                .orderCountList(StringUtils.join(totalOrderList, ","))
                .validOrderCountList(StringUtils.join(validOrderList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 获取销售排行榜数据
     * @param begin
     * @param end
     * @return SalesTop10ReportVO
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        //获取日期
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> goodsSalesList = orderMapper.getGoodsSalesTop10(beginTime, endTime);
        List<String> goodsNameList = goodsSalesList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> salesList = goodsSalesList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(goodsNameList, ","))
                .numberList(StringUtils.join(salesList, ","))
                .build();
    }


    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
